Rail attachment



FIG. 1 is a top perspective view of a rail attachment;

FIG. 2 is a front plan view thereof;

FIG. 3 is a back plan view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a bottom perspective view thereof. 

CLAIM The ornamental design for a rail attachment, as shown and described. 